• You may have a power problem. If there is no activity at all from the printer, the front panel does not respond, check that the power cable is connected correctly and that there is power available at the socket.
• If you are using a Macintosh and the print job does not print, ensure the printer language is set to Postscript or Automatic.
• You may have a problem with your application driver. Is your software configured for this printer? For general advice, see the Setup instructions. For advice specific to your software, see the documentation supplied with the driver.
• If you have connected your computer to the printer's parallel port and tried to print a binary-encoded PostScript file, it will not print. The parallel port will accept ASCII-encoded PostScript print files only. The front panel will display the message “Error processing job / Flushing rest of job”. Connect your computer to the JetDirect Print Server and send the print file again.
  You could also connect your computer via the LAN connection of your printer and send the binary-encoded PostScript print file again.
• You are trying to send binary encoded data through the TCP/IP network to your printer.
  Select PS Encoding > Binary from the Internal RIP Settings menu and send the file again.

If you continue to have problems, see tell me about online help and tell me about hp customer care.